e_idea.c

/* crypto/evp/e_idea.c *//* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */#include <stdio.h>#include "cryptlib.h"#ifndef OPENSSL_NO_IDEA#include <openssl/evp.h>#include <openssl/objects.h>#include "evp_locl.h"#include <openssl/idea.h>staticint idea_init_key(EVP_CIPHER_CTX *ctx, constunsignedchar *key,
constunsignedchar *iv,int enc);
/* NB idea_ecb_encrypt doesn't take an 'encrypt' argument so we treat it as a special * case */staticint idea_ecb_cipher(EVP_CIPHER_CTX *ctx, unsignedchar *out,
constunsignedchar *in, unsignedint inl)
{
BLOCK_CIPHER_ecb_loop()
idea_ecb_encrypt(in + i, out + i, ctx->cipher_data);
return 1;
}
/* Can't use IMPLEMENT_BLOCK_CIPHER because idea_ecb_encrypt is different */
typedef struct
{
IDEA_KEY_SCHEDULE ks;
} EVP_IDEA_KEY;
BLOCK_CIPHER_func_cbc(idea, idea, EVP_IDEA_KEY, ks)
BLOCK_CIPHER_func_ofb(idea, idea, 64, EVP_IDEA_KEY, ks)
BLOCK_CIPHER_func_cfb(idea, idea, 64, EVP_IDEA_KEY, ks)
BLOCK_CIPHER_defs(idea, IDEA_KEY_SCHEDULE, NID_idea, 8, 16, 8, 64,
0, idea_init_key, NULL,
EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL)
static int idea_init_key(EVP_CIPHER_CTX *ctx, const unsignedchar *key,
const unsignedchar *iv, int enc)
{
if(!enc) {
if (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_OFB_MODE) enc = 1;
elseif (EVP_CIPHER_CTX_mode(ctx) == EVP_CIPH_CFB_MODE) enc = 1;
}
if (enc) idea_set_encrypt_key(key,ctx->cipher_data);
else
{
IDEA_KEY_SCHEDULE tmp;
idea_set_encrypt_key(key,&tmp);
idea_set_decrypt_key(&tmp,ctx->cipher_data);
OPENSSL_cleanse((unsignedchar *)&tmp,
sizeof(IDEA_KEY_SCHEDULE));
}
return 1;
}
#endif